Brake shoe



May 6, 1930- M. w. MCCONKEY 1,756985 BRAKE SHOE Filed April 1l, 1927 PatemedMgy e,l l1930 i uNiT'EDsTATEs PATENTA OFFICE MONTGOMERY W. MQCON'KEY, or s oU'rn BENI, INDIANA, .AssIGNOR To BENDIX BRAKE COMPANY, or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS BRAKEI sIIoE` 4Application led April This invention relates' to brake shoes, and is illustrated as embodied in an internal expanding automobilebrake'of the three-shoe type, An object of. the invention is to' provvide for easily assembling the brake, by arranging one, or preferably both, of the end shoeswith a radial slot (shown as an open slot facing toward the outside of the shoe) which can readily` be mounted Qn the pivot 1.0 forthe shoe. l'

In the illustrated arrangement, the central shoe (shown as anchored at'one end) is formed with two stiflening Iwebs Ioo nnected and braced apart by members which also serve as pivots for the'end shoes.A The shoeat the end next theanchor of the central shoe may beformed, as shown, with anoppositely-faeing slot affording clearance for the anchor.

Another feature of the invention relates 20 to the construction of the end-shoe, especially as to the strengthening of 'the arm projecting at the end ofthe shoe and .formed with a slot or other opening for a pivot.

The' above and other objects and features of the invention, including variousynovely combinations of parts and ,desirable particular constructions, vwillbe apparent '-from the following description of oneillustrative embodiment shown in the accompanying drawinin which:

igure 1'isl a vertical section, broken away at the top, through the brake just inside the brace the stilening webs apart, and also serve` head of the brake drum, showing the shoes in side elevation;

Figure 2 is a side elevation of the parts of the shoes appearing in Figure `1', but detached from each other; vFigure 3 is a partial section on the vline 3-3of Figure ,1, showing lthe anchorage of 'the brake; l Figure 4 is a section through "the end of the primary end shoe, on theline' l44 of Figure2; 'd'

Fig-ure 5 is a section throu h the auxiliary end shoe, on the line 5 5 o Figure 2;

Figure 6 is a section' through the centralA or secondary shoe, on the line 6 6 of Figure 2,'showing the pivot on whlch the auxiliary'end shoe is mounted; and

Figure 7 is a partial elevationshowing the 1927. serial No.' 4182,684..

connected endsof'the primary and secondary shoes, looliing in the direction of the arrows `7-7 inFigure 1.

The brake` selected for. illustrationincludes a rotatable drum 1Q, at the Open side of which is arranged a suitable support lsuch as a backspring 20, whileshoe 16 is applied by shoe 14 against the resistance of an ,l auxiliary sprng22. The `present invention relates to the construction and arrangement of the shoes of the brake. f

The secondary shoe 16 comprises an outer band or rim'24, to which the lining 26 is attached by rivets or otherwise, and two stifening Webs 28 and 30 which are welded (by are vor' spot Welding), at their outer edges, to the inner face of band. 24.' Webs 28 and 30 are extended, atthe endsy opposite shoe 14, to,-

forrn projecting arms anchored on a pivot 32 34`serves as a spacerbetween these arms, and

` may be welded to them at its ends to serve as a bearing embracing the pivot.l

h Two bolts 3' f and 38,-passing through spacing sleeves 4C' (which may be Welded at their ends to webs 28 and 30 if desired) serve to aspivots for the lower ends of shoes 14 and 18. Spaced eccentrics 42 on a spindle 44 carried b y the backing plate 12. A bushing (carried by the backing plate 12) engage sleeve 4 0 of bolt 38,`When thebrake is released, so thatspring 22 cannot twist the shoe y sidewse 'in casel of any looseness atthe anchor 32.

Shoe 14 consists of an outer band orv rim 46 carrying the lining 48, and to which is welded a stifening web 50. At its lower end, web 50 is extended as a projecting pivot arm formed with a radial opening or slot 52 opening toward the loutside of the shoe and seated on the pivot formed by bolt 38 and'its sleeve 40. The end of this arm is reinforced by plates 54 welded to the sides of web 50,

formed with slots registering with slot 52,

thus providing a triple-width bearing surtace engaging the pivot and obviating the Aneed of any separate bushing. The end of web 50 is straddled by the two/stops 42.

` Shoe 18 comprises a band or rimI 5,6 for the lining '58, and a stiffening web 60 welded thereto and'extending downwardly as a projecting pivot arm reinforced by welded plates or stampings 62. The arm portion of web t0, and the plates 62, are formed with registogether with web 60 are provided with registering openings or radial slots 66, shown facing toward the inside of the shoe, and wide enough to afford ample clearance for the anchor 32. Thus plates 64 vhave an auxiliary 4function in reinforcing the part of shoe 18 which is weakened by the opening necessary to clear the anchor.

While one illustrative embodiment has been described indetail, it is not my intention to limitthe scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

l. A brake shoe comprising a stilfening web extending at one end of the shoe beyond the friction face as a projecting arm, and reinforcing means for said arm from substantially' the end of the arm back past the end of the friction face, said arm being formed with a radially-arranged open slot for direct engagement with a pivot.

2. A brake. shoe having a stiening web extending beyond the friction face of the shoe as a projecting arm and formed with a 'radial slotl at the end of the arm which opens toward the outside of the shoe and with a radial slot near the end of the friction face Vwhich opens toward the inside of the shoe;

3. A brake shoe having transeverse pivots near its opposite ends, and constructed and arranged to be mounted on a pivot at one end, in combination with two shoes arranged on the corresponding one of said pivots.

l 5. A brake shoe having transverse pivots near its oppositeends, in combination with .two shoes arranged at opposite ends of the first shoe, and each of which isf formed with v an arm overlapping the end of the lirst shoe the shoe connecting said webs and bracing them apart and also serving as pivots, in combination with two end shoes having at their ends open radial slots facing toward the outside of the shoes and directly pivoted on said members.

7. A brake comprising,fin combination,

at least two shoes arranged end to end, a pivot connecting adjacent ends of the shoes, a pair of stops spaced apart from each other and engageable with said pivot, and a spring arranged to urge the pivot against the stops.

8. A brake comprising, in combination, at least two shoes arranged end to end, a pivot connecting adjacent ends of the shoes, a pair of connected vand simultaneously-adjustable stops spaced apart from each other and engageable with said pivot, and a spring arranged to urge the pivot against the stops.

9. A brake comprising,'in combination, a pair ofA pivotally-connected shoes, onev of which is anchored at one end, positioning means for the connected ends of the shoes in.- cluding two stops spaced apart from each other erosswise of the shoes and serving to prevent twisting of the connected ends `as well as to determine Ltheir radial position, and yielding means urging said ends toward the -position determined by said stops.

10. A brake shoe having at one end spaced portions connected and braced `by a member adapted to serve also as a pivot, in combination with another shoe formed at its end with an yopen radial'slot facingtoward the outside gf the shoe and mounted on said pivot menier. i

l1.: A brake shoe having at one end spaced portions connected and braced by a member ada ted to serve also as a ivot in combination with another shoe formed at its-end with aradial slot mounted on said pivot member.

l2. A brake shoe anchored at one end and having a pivot at itsvother end, in combination with another shoe formed-with an open -radial slot facing toward the outside ofthe 'shoe andmounted on said pivot.

MoNrGoMERY vv. MCooNKEr. 

